- At Screening, participant states she is able and willing to refrain from taking traditional herbs or medicines and is willing to refrain from inserting any non-study vaginal products or objects into the vagina, including but not limited to, spermicides, diaphragms, contraceptive vaginal rings, vaginal medications, vaginal probiotics/pre-biotics, menstrual cups, cervical caps (or any other vaginal barrier method), douches, lubricants, vaginal drying agents and sex toys (vibrators, dildos, etc.). Tampons may be used, but for menses only.